Racaw Ltd., a designer and manufacturer of precision positioning components and systems, required reliable shaft couplings for use on its lines of linear and rotary positioning stages. The stages allow precise linear and rotary positioning of objects via a stepping or servo motor with rotary encoder control. Huco Oldham couplings were selected because they met Racaw’s torque capacity range, zero backlash, auditable noise and vibration levels, lengthy predicted service life and availability requirements.